Transportation engineering is a branch of civil engineering that involves the application of technology and scientific principles to the planning, design, operation and maintenance of transportation systems. The main objective of this field is to provide safe, efficient, rapid, comfortable, convenient, economical, and environmentally compatible movement for people and goods. It involves gathering relevant data on the population in the surrounding area, travel patterns, socio-economic characteristics, law and ordinances, and financial resources while planning a project. This information is consolidated and decision-support tools are then used to develop, design, and deliver various types of transportation projects. Some common fields associated with transportation engineering are highway engineering, railroad engineering, port and harbor engineering, and airport engineering. This book elucidates the concepts, innovative models and developments with respect to transportation engineering. It attempts to assist those with a goal of delving into this field. The readers would gain knowledge that would broaden their perspective about transportation engineering through this book.